340mm calipers in rear

N55E90toF30 · 05-30-2020, 12:16 AM

Is it possible to mount a set of the 340mm calipers on the rear of the car?

If I bought the larger 370Msport calipers/rotors and put them on the front, could I mount the 340mm calipers and rotors on the rear?

~N55

Logicoeur · 05-30-2020, 11:10 AM

With enough money, time, and engineering, yes. Why should you when it's cheaper to buy the 345mm 2piston brembo parts. Bmw has already done the hard part for you. Thread.

N55E90toF30 · 05-30-2020, 09:10 PM

Good point. Never thought about it, I thought bout 4 piston in the rear, but I suppose 2 piston and slightly larger mm M sport could be just as good.

johnung · 05-31-2020, 01:42 AM

Quote:

Originally Posted by N55E90toF30

Is it possible to mount a set of the 340mm calipers on the rear of the car?

If I bought the larger 370Msport calipers/rotors and put them on the front, could I mount the 340mm calipers and rotors on the rear?

~N55

No, you cannot mount 340's on the rear. Rear F3x brakes include 345x24, 330x20 and 300x20. Each rotor size has one specific caliper that fits it.

In addition, inside the rotor hat, rotors have to match the size of the handbrake installed on your car, either earlier 160mm or later 185mm. See photo for how to determine. Most rotors are 185mm.

05-30-2020, 12:16 AM	#1
N55E90toF30 Private First Class 35 Rep 130 Posts Drives: 2014 335xi 6speed FBO BM3 stg2 Join Date: Apr 2018 Location: Philadelphia, PA iTrader: (0)	340mm calipers in rear Is it possible to mount a set of the 340mm calipers on the rear of the car? If I bought the larger 370Msport calipers/rotors and put them on the front, could I mount the 340mm calipers and rotors on the rear? ~N55
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05-30-2020, 11:10 AM	#2
Logicoeur Lieutenant Colonel 991 Rep 1,934 Posts Drives: F30 335i xDrive Join Date: Feb 2018 Location: Boston iTrader: (0)	With enough money, time, and engineering, yes. Why should you when it's cheaper to buy the 345mm 2piston brembo parts. Bmw has already done the hard part for you. Thread. __________________ F30 335iX \| Remus Axleback \| Fabspeed Catted DP \| VRSF Comp IC \| 18X9 ET35 19lb MT1 \| 255/40/18 ECS \| Ohlins RT Millway Street \| Millway Control Arm Bushings \| Turner Endlinks \| TMH 75mm 14x1.5 Studs \| BMW MPerf LSD \| XDelete \| Pipercross Filter \| MHD Stg2 93
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05-30-2020, 09:10 PM	#3
N55E90toF30 Private First Class 35 Rep 130 Posts Drives: 2014 335xi 6speed FBO BM3 stg2 Join Date: Apr 2018 Location: Philadelphia, PA iTrader: (0)	Good point. Never thought about it, I thought bout 4 piston in the rear, but I suppose 2 piston and slightly larger mm M sport could be just as good.
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